About a couple of weeks ago, the Guest user account was automatically enabled on my Mac running OS X El Capitan (by itself, without me enabling it). Now, whenever I start my Mac, I am greeted with a login screen showing two accounts: 1) Mine. 2) Guest user.
I have Find My Mac turned off, as I know people have suggested that the Find My Mac feature may be responsible for this behavior. Beyond that, I have logged out of my iCloud account from "System Preferences -> iCloud," and also disabled the Guest account from "System Preferences -> Users & Groups." Now it shows the Guest user as off in System Preferences.
However, when I start my Mac, I'm still shown two accounts to log-in. And yes, I have tried and have successfully managed to log into the Guest account despite having disabled it in System Preferences.
This is very strange, and I was wondering if anyone has found a fix.
Additional Info which may help: I've never had this issue with any other versions of OS X prior to El Capitan. And I've got FileVault enabled, and it's been enabled since OS X Lion without this issue.
I'd greatly appreciate any feedback.
Best Answer
After some extensive testing (and multiple Time Machine restores--to verify that this fix works), I have found a solution. And it's pretty easy too, just don't do it on the go, or you'll wipe out your battery.
Poof! Guest is gone.
And that's it! It works nicely with FileVault 2, Bootcamp, and Time Machine, so no worries there.